Let Us C / Chapter 5 (Functions & Pointers)
Let Us C / Chapter 5 (Functions & Pointers)
Exercise [D]
(a) Write a function to calculate the factorial value of any
integer entered through the keyboard.Solution:
#include#include
void main() {
int num;void func();
clrscr();
printf("Please enter any number: ");scanf("%d",&num);
func(num);
getch();
}
void func(int n) {
int fact=1;
for(;n>=1;n--) {
fact=fact*n;
}
printf("\n\nFactorial value = %d \n",fact);
}
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(b) Write a function power ( a, b ), to calculate the value of a
raised to b.Solution:
#include#include
void main() {
int num1,num2 ;clrscr();
printf("Please enter the value of a:
");scanf("%d",&num1);
printf("\n\nPlease enter the value of b:
");scanf("%d",&num2);
power(num1,num2);
getch();
}
power(int a , int b) {
int c=1,i;
for(i=1;i=1;d1--) {printf("%c",thsnd);
if(a==0)break;}
/* To find all five-hundreds */
d2=a/500;b=a%500;
for(;d2>=1;d2--) {printf("%c",hndr_5);
if(b==0)break;}
/* To find all hundreds */
d3=b/100;c=b%100;
for(;d3>=1;d3--) {printf("%c",hndr);
if(c==0)break;}
/* To find all fifties *//***********************/
d4=c/50;d=c%50;
for(;d4>=1;d4--) {printf("%c",ffty);
if(d==0)break;}
/* To find all tens *//********************/
d5=d/10;e=d%10;
for(;d5>=1;d5--) {printf("%c",tn);
if(e==0)break;
}
/* To find all fives */
d6=e/5;f=e%5;
for(;d6>=1;d6--) {printf("%c",fv);
if(f==0)break;}
/* To find all ones */
for(d7=f;d7>=1;d7--) {printf("%c",one);
}
}
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(d) Any year is entered through the keyboard. Write a function
to determine whether the year is a leap year or not.Solution:
#include#includevoid main() {
int yr;void func();clrscr();
printf("Please enter the year: ");scanf("%d",&yr);
func(yr);
getch();
}void func(int y) {
if((y%4)==0)
printf("\nThis is a LEAP YEAR.\n");
else
printf("\nThis is NOT A LEAP YEAR.\n");
}
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(e) A positive integer is entered through the keyboard. Write a
function to obtain the prime factors of this number.
For example, prime factors of 24 are 2, 2, 2 and 3, whereas
prime factors of 35 are 5 and 7.Solution:
#include#include
void main() {
int i,j,k;clrscr();
printf("enter the number: ");
scanf("%d",&j);
printf("\n\nprime factors:");
for(i=2;i
